JP6487789B2 - Control rod storage device and method for modifying control rod storage device - Google Patents

Control rod storage device and method for modifying control rod storage device Download PDF

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JP6487789B2
JP6487789B2 JP2015123450A JP2015123450A JP6487789B2 JP 6487789 B2 JP6487789 B2 JP 6487789B2 JP 2015123450 A JP2015123450 A JP 2015123450A JP 2015123450 A JP2015123450 A JP 2015123450A JP 6487789 B2 JP6487789 B2 JP 6487789B2
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hanger member
control rod
storage device
inclination angle
control
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JP2017009364A (en
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成良 岩倉
成良 岩倉
淳 齊藤
淳 齊藤
光幸 佐藤
光幸 佐藤
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Hitachi GE Nuclear Energy Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E30/30—Nuclear fission reactors

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Description

本発明は、貯蔵プールに設置される制御棒貯蔵装置および制御棒貯蔵装置の改造方法に関するものである。   The present invention relates to a control rod storage device installed in a storage pool and a method for remodeling the control rod storage device.

沸騰水型原子力発電所において、点検等の目的で炉心から全数あるいは比較的多数の制御棒を取り出すことがある。この場合、制御棒は、再び炉心に戻して再使用する必要があることから、貯蔵プール内で一時的に健全な状態を維持して貯蔵、保管する必要がある。
また、定期検査で定期的に制御棒を交換する場合にも同様に、貯蔵プール内で貯蔵、保管される。 In boiling water nuclear power plants, all or a relatively large number of control rods may be removed from the core for inspection or other purposes. In this case, since it is necessary to return the control rod to the core again and reuse it, it is necessary to store and store the control rod while maintaining a healthy state temporarily in the storage pool.
Similarly, when the control rod is periodically replaced in the periodic inspection, it is stored and stored in the storage pool.

従来、貯蔵プール内で制御棒を貯蔵する技術として特許文献１に開示されたものが知られている。
特許文献１は、交換作業等での取扱上の制限および放射線遮へいの観点から、比較的水深を確保可能な貯蔵プール内で制御棒を貯蔵するものである。特許文献１では、水深の深いエリアとなる部分に貯蔵ラックを配置し、当該ラックに真上から制御棒を挿入してラック内に制御棒を着座させ、制御棒を貯蔵、保管している。 Conventionally, what was disclosed by patent document 1 as a technique which stores a control rod within a storage pool is known.
Patent Document 1 stores control rods in a storage pool in which a relatively deep water can be ensured from the viewpoint of handling restrictions in exchange work or the like and radiation shielding. In Patent Document 1, a storage rack is arranged in a portion that becomes a deep water area, a control rod is inserted into the rack from above, the control rod is seated in the rack, and the control rod is stored and stored.

ここで、水深の深いエリアは燃料体の貯蔵のためのスペースが主であり、特許文献１では、燃料体の貯蔵スペースを広くするために、ラック同士を上下に重ねている。つまり、水深の深いエリアにおいて、制御棒の貯蔵スペースは、極力狭く抑えたいという制約がある。このため、水深の深いエリアでは、制御棒の貯蔵容量も最小限にする必要があり、前記した炉内の点検等で多くの制御棒を一度に取り出す場合には、その貯蔵、保管が可能となるだけの十分な貯蔵容量を確保することが難しいといった問題があった。   Here, in the deep water area, a space for storing the fuel body is mainly used. In Patent Document 1, racks are stacked one above the other in order to widen the storage space for the fuel body. That is, there is a restriction that the storage space for the control rods should be kept as narrow as possible in the deep water area. For this reason, it is necessary to minimize the storage capacity of control rods in deep water areas. If many control rods are taken out at the same time, such as inspection in the furnace, they can be stored and stored. There was a problem that it was difficult to secure a sufficient storage capacity.

そこで、貯蔵プール内で比較的スペースに余裕のある水深の浅いエリアを制御棒の貯蔵、保管スペースとして有効利用することが考えられる。しかし、水深の浅いエリアは、制御棒の取扱、貯蔵時の放射線遮へいの観点から、水深の深いエリアと同様に制御棒を扱うことができないという制約がある。   Therefore, it is conceivable to effectively use a shallow area with a relatively large space in the storage pool as a storage and storage space for control rods. However, the shallow water area has the restriction that the control rod cannot be handled in the same manner as the deep water area from the viewpoint of handling the control rod and shielding radiation during storage.

このため水深の浅いエリアでは、特許文献２に開示されているように、貯蔵ハンガを用いて、放射線遮へいの観点から所定の水深を維持した状態で水平方向に制御棒を移動させ、ハンガに制御棒を吊り下げる方法がとられている。
また、特許文献３に開示されているように、ゲート状の部品が開閉する構造の貯蔵ラックを用い、水平方向から制御棒をラックに挿入する方法がとられている。 For this reason, in an area where the water depth is shallow, as disclosed in Patent Document 2, the storage hanger is used to move the control rod in a horizontal direction while maintaining a predetermined water depth from the viewpoint of radiation shielding, and the hanger is controlled. The method of hanging a stick is taken.
Moreover, as disclosed in Patent Document 3, a storage rack having a structure in which a gate-like component opens and closes is used, and a method of inserting control rods into the rack from the horizontal direction is employed.

特開昭６０−２１４９１号公報JP-A-60-21491 実開昭５９−９８３９９号公報Japanese Utility Model Publication No.59-98399 特公昭６１−４８８７７号公報Japanese Examined Patent Publication No. 61-48877

特許文献２の制御棒貯蔵装置は、図８に示すように、装置１００の上端に設けられたハンガとしての水平バー部材１０１に、制御棒５０の上部ハンドル部５１を吊り下げて貯蔵、保管を行う構造である。しかしながら、設備に適用される耐震条件のうち、特に上下方向の加速度が大きい場合には、図９に示すように、水平バー部材１０１が上下に振動し、吊り下げた制御棒５０が装置の外側に飛び跳ねて脱落するおそれがあった。この場合、制御棒５０が貯蔵プールＰ内に落下することにより、貯蔵プールＰ内の重要度の高い他機器を損傷させるおそれもあった。   As shown in FIG. 8, the control rod storage device of Patent Document 2 hangs the upper handle portion 51 of the control rod 50 on a horizontal bar member 101 as a hanger provided at the upper end of the device 100 for storage and storage. It is a structure to perform. However, among the seismic conditions applied to the equipment, particularly when the vertical acceleration is large, as shown in FIG. 9, the horizontal bar member 101 vibrates up and down, and the suspended control rod 50 is located outside the apparatus. There was a risk of jumping and dropping off. In this case, when the control rod 50 falls into the storage pool P, there is a risk of damaging other important equipment in the storage pool P.

また、特許文献３の制御棒貯蔵設備は、設備に貯蔵した制御棒の荷重をラックの下部構造（底部）で受けるため、耐震・強度の維持は可能である。しかしながら、制御棒をラック内に挿入する際に、事前にゲート状の部品を開けておき、制御棒挿入後に同部品を閉め、制御棒の貯蔵後にもラックの強度を確保する必要があるといった貯蔵前後の準備・復旧作業が伴う煩雑さがあった。また、貯蔵ラックの構造が複雑になるという課題があった。   Moreover, since the control rod storage equipment of patent document 3 receives the load of the control rod stored in the equipment by the lower structure (bottom part) of the rack, it is possible to maintain earthquake resistance and strength. However, when inserting the control rod into the rack, it is necessary to open the gate-shaped component in advance, close the component after inserting the control rod, and secure the rack strength even after storing the control rod. There was a complication associated with preparation and restoration work before and after. In addition, there is a problem that the structure of the storage rack becomes complicated.

そこで本発明は、構造が簡単であるとともに、制御棒の貯蔵・保管作業が行い易く、しかも、吊り下げた制御棒の脱落を好適に防止することができる制御棒貯蔵装置および制御棒貯蔵装置の改造方法を提供することにある。   Therefore, the present invention provides a control rod storage device and a control rod storage device that are simple in structure, easy to store and store control rods, and that can suitably prevent the suspended control rods from dropping off. It is to provide a remodeling method.

本発明の制御棒貯蔵装置は、貯蔵プールの底面に設置される基部と、前記基部に立設された支柱と、前記支柱の上部に取り付けられて左右に延在し、制御棒に備わる枠状の上部ハンドル部を介して前記制御棒を支持するハンガ部材と、を備え、前記ハンガ部材は、左右方向の中央部から左右方向の両端部に向かうにつれて上方へ傾斜するような傾斜角度で延在しており、前記ハンガ部材の前記傾斜角度は、前記ハンガ部材の高さ方向の大きさが、前記上部ハンドル部の高さ方向の枠内に収まる大きさとなる角度に設定されていることを特徴とする。 The control rod storage device of the present invention includes a base installed on the bottom surface of the storage pool, a support column erected on the base , a frame-like shape attached to the upper portion of the support column and extending to the left and right and provided on the control rod A hanger member that supports the control rod via an upper handle portion of the hanger, and the hanger member extends at an inclination angle so as to incline upward from the central portion in the left-right direction toward both ends in the left-right direction. The inclination angle of the hanger member is set such that the size of the hanger member in the height direction fits within the frame of the upper handle portion in the height direction. And

また、本発明の制御棒貯蔵装置の改造方法は、貯蔵プールの底面に設置される基部と、前記基部から上方へ延在する支柱と、前記支柱の上部に取り付けられて左右に延在し、制御棒に備わる枠状の上部ハンドル部を介して前記制御棒を支持するハンガ部材と、を備えた制御棒貯蔵装置の改造方法であって、前記ハンガ部材の左右方向の中央部に対して前記ハンガ部材の左右の端部を治具で持ち上げ、前記ハンガ部材の高さ方向の大きさが、前記上部ハンドル部の高さ方向の枠内に収まる大きさとなるように、前記ハンガ部材の左右方向の中央部から前記ハンガ部材の左右方向の両端部に向かうにつれて、前記ハンガ部材が上方へ傾斜するような傾斜角度にしたことを特徴とする。 The remodeling method of the control rod storage device of the present invention includes a base installed on the bottom surface of the storage pool, a support column extending upward from the base, and attached to the top of the support column and extending left and right. A hanger member for supporting the control rod via a frame-shaped upper handle portion provided on the control rod, and a modification method of the control rod storage device, wherein the hanger member The left and right ends of the hanger member are lifted with a jig so that the size of the hanger member in the height direction fits within the height direction frame of the upper handle portion. The hanger member is inclined at an angle so that the hanger member is inclined upward as it goes from the center of the hanger member toward the left and right ends of the hanger member.

本発明によれば、構造が簡単であるとともに、制御棒の貯蔵・保管作業が行い易く、しかも、吊り下げた制御棒の脱落を好適に防止することができる制御棒貯蔵装置および制御棒貯蔵装置の改造方法が得られる。   According to the present invention, a control rod storage device and a control rod storage device that have a simple structure, can easily store and store the control rods, and can suitably prevent the suspended control rods from dropping off. The remodeling method is obtained.

本発明の一実施形態の制御棒貯蔵装置を示す正面図である。It is a front view which shows the control rod storage apparatus of one Embodiment of this invention. 一実施形態の制御棒貯蔵装置のハンガ部材を示す拡大正面図である。It is an enlarged front view which shows the hanger member of the control-rod storage apparatus of one Embodiment. （ａ）はハンガ部材の切欠部を示す拡大正面図、（ｂ）は変形例のハンガ部材の切欠部を示す拡大正面図、（ｃ）は振動の下限位置におけるハンガ部材の切欠部の様子を示す拡大正面図である。(A) is an enlarged front view showing a notch portion of a hanger member, (b) is an enlarged front view showing a notch portion of a hanger member of a modification, and (c) is a state of the notch portion of the hanger member at a lower limit position of vibration. It is an enlarged front view shown. 制御棒の貯蔵・保管作業時の様子を示す正面図である。It is a front view which shows the mode at the time of the storage / storage operation | work of a control rod. ハンガ部材の上下振動の様子を示す正面図である。It is a front view which shows the mode of the vertical vibration of a hanger member. 貯蔵プールに制御棒貯蔵装置を複数設置した状態を示す模式斜視図である。It is a model perspective view which shows the state which installed multiple control-rod storage apparatuses in the storage pool. 制御棒貯蔵装置の改造手順を示すハンガ部材の拡大正面図である。It is an enlarged front view of the hanger member which shows the remodeling procedure of a control-rod storage apparatus. 従来技術の説明図である。It is explanatory drawing of a prior art. 従来技術の説明図である。It is explanatory drawing of a prior art.

以下、本発明に係る制御棒貯蔵装置の実施形態について図面を参照して説明する。ここで、以下の説明において、「上下」「左右」を言うときは、図１，図２に示す方向を基準とする。   Hereinafter, an embodiment of a control rod storage device according to the present invention will be described with reference to the drawings. Here, in the following description, when referring to “up and down” and “left and right”, the directions shown in FIGS. 1 and 2 are used as a reference.

図１に示すように、制御棒貯蔵装置１は、貯蔵プールＰの底面Ｐ１を利用して底面Ｐ１に設置されるものである。制御棒貯蔵装置１は、基部１０と、支柱２０と、ハンガ部材３０とを備えている。   As shown in FIG. 1, the control rod storage device 1 is installed on the bottom surface P <b> 1 using the bottom surface P <b> 1 of the storage pool P. The control rod storage device 1 includes a base 10, a support 20, and a hanger member 30.

基部１０は、傾斜桟１１を備えている。傾斜桟１１は支柱２０を支持している。傾斜桟１１の下端部は、図示しない固定手段によって、貯蔵プールＰの底面Ｐ１に固定されている。   The base 10 includes an inclined bar 11. The inclined beam 11 supports the column 20. The lower end of the inclined bar 11 is fixed to the bottom surface P1 of the storage pool P by fixing means (not shown).

支柱２０は、基部１０に支持されて立設されており、制御棒５０（図４参照）の荷重に耐え得る強度、剛性を備えている。支柱２０の上端２１には、ハンガ部材３０が取り付けられている。ハンガ部材３０は、溶接やボルトを用いた固定手段によって支柱２０に固定されている。   The support column 20 is erected and supported by the base 10 and has strength and rigidity that can withstand the load of the control rod 50 (see FIG. 4). A hanger member 30 is attached to the upper end 21 of the column 20. The hanger member 30 is fixed to the support column 20 by fixing means using welding or bolts.

ハンガ部材３０は、制御棒５０（図４参照）を支持する部材である。ハンガ部材３０は、図２に示すように、左右に延在する板状の部材からなり、正面視で略Ｖ字状を呈している。ハンガ部材３０は、左右方向の中央部３２から左右方向の両端部３３ａ，３３ｂに向かうにつれて上方へ傾斜するように延在している。   The hanger member 30 is a member that supports the control rod 50 (see FIG. 4). As shown in FIG. 2, the hanger member 30 is composed of a plate-like member extending to the left and right, and has a substantially V-shape when viewed from the front. The hanger member 30 extends so as to incline upward from the central portion 32 in the left-right direction toward both end portions 33a, 33b in the left-right direction.

ハンガ部材３０は、地震等の外力を受けた際に、制御棒５０を支持した状態のまま上下方向に振動するようになっている。この際、ハンガ部材３０は、図５に示すように、振動の下限位置で、略水平姿勢（水平方向にハンガ部材３０が延在する姿勢）を採るように構成されている。つまり、ハンガ部材３０は、地震等の外力を受けた際に、左右両端部３３ａ，３３ｂが水平な基準面Ｓよりも下側に垂れ下がり難い構成となっている。   The hanger member 30 is configured to vibrate in the vertical direction while supporting the control rod 50 when receiving an external force such as an earthquake. At this time, as shown in FIG. 5, the hanger member 30 is configured to take a substantially horizontal posture (a posture in which the hanger member 30 extends in the horizontal direction) at the lower limit position of vibration. That is, the hanger member 30 has a configuration in which the left and right end portions 33a and 33b are unlikely to hang down below the horizontal reference plane S when receiving an external force such as an earthquake.

本実施形態では、水平な基準面Ｓに対する傾斜角度θ１（図２参照）が、１０度以上１５度以下に設定している。傾斜角度θ１は、制御棒５０を貯蔵する際等の取合い、および前記した地震等の外力による上下方向の振動量を考慮して設定される。つまり、制御棒５０の上部ハンドル部５１の枠内（図４参照）寸法に、ハンガ部材３０の高さ寸法が収まるように傾斜角度θ１を設定している。また、前記のように地震等の外力を受けた際の振動の下限位置で、ハンガ部材３０が略水平姿勢を採るように設定している。   In the present embodiment, the inclination angle θ1 (see FIG. 2) with respect to the horizontal reference plane S is set to 10 degrees or more and 15 degrees or less. The inclination angle θ1 is set in consideration of the amount of vibration in the vertical direction caused by external forces such as earthquakes and the like when storing the control rod 50 and the like. That is, the inclination angle θ1 is set so that the height dimension of the hanger member 30 fits within the frame of the upper handle portion 51 of the control rod 50 (see FIG. 4). Further, as described above, the hanger member 30 is set to take a substantially horizontal posture at the lower limit position of vibration when receiving an external force such as an earthquake.

ハンガ部材３０の上縁には、所定間隔を置いて切欠部３１が形成されている。切欠部３１は、図３（ａ）に示すように、略コ字状を呈しており、底部３１ａと、一側部３１ｂと、他側部３１ｃと、を備えている。底部３１ａは平であり、略水平に形成されている。一側部３１ｂは、底部３１ａの一端部（図３（ａ）では底部３１ａの左端部）から略鉛直に立ち上がっている。他側部３１ｃは、底部３１ａの他端部（図３（ａ）では底部３１ａの右端部）からハンガ部材３０の中央部３２側に向けて傾斜状に立ち上がっている。   A notch 31 is formed on the upper edge of the hanger member 30 at a predetermined interval. As shown in FIG. 3A, the notch 31 is substantially U-shaped and includes a bottom 31a, one side 31b, and the other side 31c. The bottom 31a is flat and formed substantially horizontally. The one side portion 31b rises substantially vertically from one end portion of the bottom portion 31a (the left end portion of the bottom portion 31a in FIG. 3A). The other side portion 31 c rises in an inclined manner from the other end portion of the bottom portion 31 a (the right end portion of the bottom portion 31 a in FIG. 3A) toward the central portion 32 side of the hanger member 30.

このような制御棒貯蔵装置１に制御棒５０を支持する場合には、図４に示すように、ハンガ部材３０の左右側方から制御棒５０をクレーン（不図示）等により水平移動させて、ハンガ部材３０に制御棒５０を近づける。この場合、制御棒５０の水深（水厚）を確保しながら制御棒５０を移動させる。   When the control rod 50 is supported by such a control rod storage device 1, as shown in FIG. 4, the control rod 50 is horizontally moved by a crane (not shown) or the like from the left and right sides of the hanger member 30, The control rod 50 is brought close to the hanger member 30. In this case, the control rod 50 is moved while ensuring the water depth (water thickness) of the control rod 50.

その後、水平移動を継続して、制御棒５０の上部ハンドル部５１にハンガ部材３０の端部３３ａ（３３ｂ）を挿通させ、切欠部３１の位置に制御棒５０が来たらクレーンにより制御棒５０を下降させる。これにより、切欠部３１に上部ハンドル部５１が係止され、ハンガ部材３０に制御棒５０が支持される。   Thereafter, the horizontal movement is continued, and the end 33a (33b) of the hanger member 30 is inserted into the upper handle portion 51 of the control rod 50. When the control rod 50 comes to the position of the notch 31, the control rod 50 is moved by a crane. Lower. As a result, the upper handle portion 51 is locked to the notch portion 31, and the control rod 50 is supported by the hanger member 30.

本実施形態では、ハンガ部材３０の傾斜角度θ１（図２参照）が１０度以上１５度以下に設定され、上部ハンドル部５１の枠内に、ハンガ部材３０の高さが収まるようにしてあるので、水平移動を行うだけで、上部ハンドル部５１にハンガ部材３０を挿通させることができる。つまり、制御棒５０に対して上下方向の移動を加えることなく、ハンガ部材３０に沿う制御棒５０の移動が可能である。したがって、貯蔵時等におけるクレーンの操作が簡単であり、貯蔵・保管作業が行い易い。   In the present embodiment, the inclination angle θ1 (see FIG. 2) of the hanger member 30 is set to 10 degrees or more and 15 degrees or less, and the height of the hanger member 30 is set within the frame of the upper handle portion 51. The hanger member 30 can be inserted through the upper handle 51 only by performing horizontal movement. That is, the control rod 50 can be moved along the hanger member 30 without adding a vertical movement to the control rod 50. Therefore, the operation of the crane at the time of storage or the like is simple, and the storage and storage work is easy to perform.

しかも、ハンガ部材３０の傾斜角度θ１を１０度以上１５度以下に設定しているので、地震等の外力を受けた際の振動の下限位置で、ハンガ部材３０が略水平姿勢を採るようになり、ハンガ部材３０の左右両端部３３ａ，３３ｂが水平面よりも下側に垂れ下がり難くなる。したがって、吊り下げた制御棒５０が装置の外側に飛び跳ねて脱落するのを好適に防止することができる。   Moreover, since the inclination angle θ1 of the hanger member 30 is set to 10 degrees or more and 15 degrees or less, the hanger member 30 takes a substantially horizontal posture at the lower limit position of vibration when receiving an external force such as an earthquake. The left and right end portions 33a and 33b of the hanger member 30 are less likely to hang down below the horizontal plane. Therefore, it is possible to suitably prevent the suspended control rod 50 from jumping to the outside of the apparatus and dropping off.

次に、図７を参照して制御棒貯蔵装置の改造方法について説明する。この改造方法は、既設の制御棒貯蔵装置において、ハンガ部材３０Ａが水平方向に延在する構成である場合に、治具４０を用いてハンガ部材３０Ａを改造し、ハンガ部材３０Ａに傾斜角度θ１をもたせるようにしたものである。   Next, a method for modifying the control rod storage device will be described with reference to FIG. In this remodeling method, in the existing control rod storage device, when the hanger member 30A extends horizontally, the hanger member 30A is remodeled using the jig 40, and the hanger member 30A is given an inclination angle θ1. It is intended to give it.

治具４０は、ハンガ部材３０Ａの中央部３２Ａに当接する第一底部４１と、第一底部４１に対してθ１の傾斜角度を有する第二底部４２と、を備えている。   The jig 40 includes a first bottom portion 41 that contacts the central portion 32A of the hanger member 30A, and a second bottom portion 42 that has an inclination angle of θ1 with respect to the first bottom portion 41.

改造時には、ハンガ部材３０Ａの中央部３２Ａに治具４０の第一底部４１を当接させる。その後、第一底部４１を当接させた側の端部３３ｂ（３３ａ）を治具で持ち上げ、ハンガ部材３０Ａを塑性変形させる。同様の作業を、ハンガ部材３０Ａの反対側について行うことで、ハンガ部材３０Ａを略Ｖ字形状に改造することができる。   When remodeling, the first bottom portion 41 of the jig 40 is brought into contact with the central portion 32A of the hanger member 30A. Thereafter, the end 33b (33a) on the side where the first bottom 41 is brought into contact is lifted with a jig to plastically deform the hanger member 30A. By performing the same operation on the opposite side of the hanger member 30A, the hanger member 30A can be modified into a substantially V shape.

以上のようにすることで、水平方向に延在する構成のハンガ部材３０Ａを改造して、傾斜角度θ１を備えたハンガ部材３０Ａとすることができ、高耐震化を図ることができる。
なお、治具を複数種類用意しておくことで、所望の傾斜角度を有するハンガ部材３０Ａに改造することができる。また、ハンガ部材に予め傾斜角度が備わる場合にも、治具を用いて、異なる傾斜角度となるように変更することもできる。 As described above, the hanger member 30A having a configuration extending in the horizontal direction can be remodeled into the hanger member 30A having the inclination angle θ1, and high earthquake resistance can be achieved.
Note that by preparing a plurality of types of jigs, the hanger member 30A having a desired inclination angle can be modified. Even when the hanger member is provided with an inclination angle in advance, it can be changed using a jig so as to have a different inclination angle.

以上説明した本実施形態によれば、制御棒貯蔵装置１が、基部１０と、支柱２０と、ハンガ部材３０とを備える構成であるので、構造が簡単であり、コストを低減した制御棒５０の貯蔵が可能である。   According to the present embodiment described above, the control rod storage device 1 is configured to include the base 10, the support column 20, and the hanger member 30. Therefore, the structure of the control rod 50 is simple and the cost is reduced. Storage is possible.

また、ハンガ部材３０が略Ｖ字形状を呈しているので、地震等の外力を受けた場合にもハンガ部材３０から制御棒５０が脱落し難く、安定した制御棒５０の貯蔵・保管が可能である。しかも、地震等の外力を受けた際のハンガ部材３０の振動の下限位置で、ハンガ部材３０が略水平姿勢を採るので、吊り下げた制御棒５０が装置の外側に飛び跳ねて脱落するのを好適に防止することができる。これにより、貯蔵プールＰ内の重要度の高い他機器を損傷させると言う波及的な影響を最小限に抑えることが可能である。
また、ハンガ部材３０が略Ｖ字形状を呈しているので、切欠部３１から制御棒５０が外れた場合に、制御棒５０は、ハンガ部材３０の中央部３２に移動するだけであるので、この場合にも貯蔵プールＰ内の重要度の高い他機器を損傷させると言う波及的な影響を生じることがない。 Moreover, since the hanger member 30 is substantially V-shaped, the control rod 50 is not easily dropped from the hanger member 30 even when subjected to an external force such as an earthquake, and stable storage and storage of the control rod 50 is possible. is there. Moreover, since the hanger member 30 takes a substantially horizontal position at the lower limit position of the vibration of the hanger member 30 when an external force such as an earthquake is applied, it is preferable that the suspended control rod 50 jumps outside the apparatus and falls off. Can be prevented. As a result, it is possible to minimize the ripple effect of damaging other highly important devices in the storage pool P.
Further, since the hanger member 30 has a substantially V-shape, when the control rod 50 is detached from the notch 31, the control rod 50 only moves to the central portion 32 of the hanger member 30. Even in this case, there is no spillover effect of damaging other important equipment in the storage pool P.

ここで、図３（ｂ）に示すように、ハンガ部材３０の切欠部３１Ａの底部３１ａに対して角度θ２を付してもよい。底部３１ａは、角度θ２によって水平な基準面Ｓ（図２参照）から傾斜する状態となる。一方、底部３１ａは、角度θ２によって、図３（ｃ）に示すように、地震等の外力を受けた際のハンガ部材３０の振動の下限位置で、略水平状態となる。このように、ハンガ部材３０の振動の下限位置で底部３１ａが略水平状態となるので、切欠部３１Ａに吊り下げた制御棒５０が安定し、装置の外側に制御棒５０が飛び跳ねて脱落するのをより一層好適に防止することができる。   Here, as shown in FIG. 3B, an angle θ <b> 2 may be given to the bottom 31 a of the notch 31 </ b> A of the hanger member 30. The bottom 31a is inclined from the horizontal reference plane S (see FIG. 2) by the angle θ2. On the other hand, as shown in FIG. 3C, the bottom 31a is in a substantially horizontal state at the lower limit position of vibration of the hanger member 30 when subjected to an external force such as an earthquake, depending on the angle θ2. Thus, since the bottom 31a is substantially horizontal at the lower limit position of the vibration of the hanger member 30, the control rod 50 suspended from the notch 31A is stabilized, and the control rod 50 jumps out of the apparatus and falls off. Can be more suitably prevented.

以上、本発明の実施形態について説明したが、本発明は前記実施形態に限定されることなく、その趣旨を逸脱しない範囲で適宜に変更が可能である。
例えば、水平な基準面Ｓに対する傾斜角度θ１を、１０度未満に設定してもよい。このように１０度未満に設定することにより、傾斜角度θ１が小さくなるので、制御棒貯蔵装置１への制御棒５０の挿入性が向上し作業時間が短縮される。作業時間の短縮はコストの低減に寄与する。 The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, the inclination angle θ1 with respect to the horizontal reference plane S may be set to less than 10 degrees. By setting the angle less than 10 degrees in this way, the inclination angle θ1 is reduced, so that the insertability of the control rod 50 into the control rod storage device 1 is improved and the working time is shortened. Shortening work time contributes to cost reduction.

また、これとは逆に、水平な基準面Ｓに対する傾斜角度θ１を、１５度より大きく設定してもよい。このように１５度より大きく設定することによって、地震時の貯蔵プールＰ内での制御棒５０の保持性をより向上させることができる。   On the contrary, the inclination angle θ1 with respect to the horizontal reference plane S may be set larger than 15 degrees. By setting the angle larger than 15 degrees as described above, the holding ability of the control rod 50 in the storage pool P at the time of an earthquake can be further improved.

また、制御棒貯蔵装置１は、図６に示すように、支柱２０の上端部を連結部材３５で連結して、貯蔵プールＰ内に複数並べて設置することができる。この場合、連結部材３５の端部３５ａは、貯蔵プールＰの側壁Ｐ２に延設して側壁Ｐ２に固定するとよい。また、図６では、支柱２０の上端部以外の部分にも、連結部材３５を利用してハンガ部材３０を設置している。これにより、ハンガ部材３０の設置数を増やすことができ、より多くの制御棒５０（図４参照）を効率よく貯蔵することが可能である。また、連結部材３５で連結することによって、制御棒貯蔵装置１相互の強度向上も図ることができる。   Further, as shown in FIG. 6, a plurality of control rod storage devices 1 can be installed in the storage pool P by connecting the upper ends of the columns 20 with a connecting member 35. In this case, the end 35a of the connecting member 35 is preferably extended to the side wall P2 of the storage pool P and fixed to the side wall P2. Further, in FIG. 6, the hanger member 30 is installed on the portion other than the upper end portion of the support column 20 using the connecting member 35. Thereby, the number of installation of the hanger member 30 can be increased, and more control rods 50 (see FIG. 4) can be efficiently stored. Further, by connecting with the connecting member 35, the strength of the control rod storage devices 1 can be improved.

また、切欠部３１の底部３１ａの水平な基準面Ｓに対する角度θ２は、適宜設定することができる。この場合、角度θ２を大きくすることにより、振動の下限位置において、底部３１ａは、ハンガ部材３０の中央部３２に向けて下る傾斜状に配され、装置の外部に制御棒５０が脱落するのをより好適に防止することができる。   Further, the angle θ2 of the bottom 31a of the notch 31 with respect to the horizontal reference plane S can be set as appropriate. In this case, by increasing the angle θ2, at the lower limit position of the vibration, the bottom portion 31a is arranged in an inclined shape toward the central portion 32 of the hanger member 30, and the control rod 50 is prevented from dropping out of the apparatus. It can prevent more suitably.

１ 制御棒貯蔵装置
１０ 基部
２０ 支柱
２１ 上部
３０ ハンガ部材
３０Ａ ハンガ部材
３１ 切欠部
３１ａ 底部
３１ｂ 一側部（側部）
３１ｃ 他側部（側部）
３２ 中央部
３３ａ，３３ｂ 端部
４０ 治具
５０ 制御棒
Ｐ 貯蔵プール
Ｐ１ 底面
θ１ 傾斜角度 DESCRIPTION OF SYMBOLS 1 Control rod storage apparatus 10 Base 20 Support | pillar 21 Upper part 30 Hanger member 30A Hanger member 31 Notch part 31a Bottom part 31b One side part (side part)
31c Other side (side)
32 Central part 33a, 33b End part 40 Jig 50 Control rod P Storage pool P1 Bottom face θ1 Inclination angle

Claims (7)

貯蔵プールの底面に設置される基部と、前記基部に立設された支柱と、前記支柱の上部に取り付けられて左右に延在し、制御棒に備わる枠状の上部ハンドル部を介して前記制御棒を支持するハンガ部材と、を備え、
前記ハンガ部材は、
左右方向の中央部から左右方向の両端部に向かうにつれて上方へ傾斜するような傾斜角度で延在しており、
前記ハンガ部材の前記傾斜角度は、前記ハンガ部材の高さ方向の大きさが、前記上部ハンドル部の高さ方向の枠内に収まる大きさとなる角度に設定されていることを特徴とする制御棒貯蔵装置。 The base is installed on the bottom surface of the storage pool, the support is erected on the base, and is attached to the top of the support and extends to the left and right, and the control is performed through a frame-shaped upper handle provided on the control rod. A hanger member for supporting the rod ,
The hanger member is
It extends at an inclination angle so as to incline upward from the central part in the left-right direction toward both ends in the left-right direction ,
The control rod is characterized in that the inclination angle of the hanger member is set to an angle such that the size of the hanger member in the height direction fits within the frame in the height direction of the upper handle portion. Storage device. 前記ハンガ部材は、
外力を受けた際に上下方向に振動するようになっており、
振動の下限位置で、略水平姿勢または略水平姿勢よりも上方へ傾斜する姿勢を保つことを特徴とする請求項１に記載の制御棒貯蔵装置。 The hanger member is
When receiving external force, it will vibrate up and down,
2. The control rod storage device according to claim 1, wherein the control rod storage device maintains a substantially horizontal posture or a posture tilted upward from the substantially horizontal posture at a lower limit position of vibration. 前記ハンガ部材には、制御棒を係止する切欠部が形成されており、
前記切欠部は、平らな底部と、前記底部から立ち上がる側部と、を備えており、
前記底部は、前記ハンガ部材の振動の下限位置にて、略水平または前記ハンガ部材の中央部に向けて下る傾斜状に配されることを特徴とする請求項１または請求項２に記載の制御棒貯蔵装置。 The hanger member has a notch for locking the control rod,
The notch includes a flat bottom and a side that rises from the bottom,
3. The control according to claim 1, wherein the bottom portion is disposed substantially horizontally or in an inclined shape descending toward a central portion of the hanger member at a lower limit position of vibration of the hanger member. Bar storage device. 前記傾斜角度は、水平な基準面に対して、１０度以上１５度以下であることを特徴とする請求項１から請求項３のいずれか１項に記載の制御棒貯蔵装置。   The control rod storage device according to any one of claims 1 to 3, wherein the inclination angle is 10 degrees or more and 15 degrees or less with respect to a horizontal reference plane. 前記傾斜角度は、水平な基準面に対して、１０度未満であることを特徴とする請求項１から請求項３のいずれか１項に記載の制御棒貯蔵装置。   The control rod storage device according to any one of claims 1 to 3, wherein the inclination angle is less than 10 degrees with respect to a horizontal reference plane. 前記傾斜角度は、水平な基準面に対して、１５度より大きいことを特徴とする請求項１から請求項３のいずれか１項に記載の制御棒貯蔵装置。   The control rod storage device according to any one of claims 1 to 3, wherein the inclination angle is larger than 15 degrees with respect to a horizontal reference plane. 貯蔵プールの底面に設置される基部と、前記基部から上方へ延在する支柱と、前記支柱の上部に取り付けられて左右に延在し、制御棒に備わる枠状の上部ハンドル部を介して前記制御棒を支持するハンガ部材と、を備えた制御棒貯蔵装置の改造方法であって、
前記ハンガ部材の左右方向の中央部に対して前記ハンガ部材の左右の端部を治具で持ち上げ、前記ハンガ部材の高さ方向の大きさが、前記上部ハンドル部の高さ方向の枠内に収まる大きさとなるように、前記ハンガ部材の左右方向の中央部から前記ハンガ部材の左右方向の両端部に向かうにつれて、前記ハンガ部材が上方へ傾斜するような傾斜角度にしたことを特徴とする制御棒貯蔵装置の改造方法。 A base installed on the bottom surface of the storage pool, a support column extending upward from the base, and attached to the upper part of the support column and extending to the left and right, via a frame-shaped upper handle portion provided in the control rod A hanger member for supporting the control rod, and a modification method of the control rod storage device comprising:
The left and right end portions of the hanger member are lifted by a jig with respect to the center portion in the left-right direction of the hanger member, and the height direction size of the hanger member is within the height direction frame of the upper handle portion. The control is characterized in that the hanger member is inclined so that the hanger member is inclined upward as it goes from the central portion in the left-right direction of the hanger member to both ends in the left-right direction of the hanger member so as to be accommodated. Remodeling method of stick storage device.
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JPS5546140A (en) * 1978-09-29 1980-03-31 Hitachi Ltd Control rod storage mechanism
JPS55101093A (en) * 1979-01-29 1980-08-01 Tokyo Shibaura Electric Co Storage device
JPS56112691A (en) * 1980-02-12 1981-09-05 Hitachi Ltd Storage facility for hanger type spent control rod
US4434092A (en) * 1981-04-06 1984-02-28 Paul Mary Method for preparing radioactive control rods from nuclear reactors for storage or disposal
JPS5998399U (en) * 1982-12-22 1984-07-03 株式会社日立製作所 control rod storage device
JPS6372597U (en) * 1986-10-29 1988-05-14
JPH07191183A (en) * 1993-12-27 1995-07-28 Hitachi Ltd Spent fuel storing method and rack for storing spent fuel
US6047037A (en) * 1997-05-19 2000-04-04 Combustion Engineering, Inc. Multi-lift tool and method for moving control rods in a nuclear reactor

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